Rotary planing-cutter



UNITED STATES PATENT OFFICE.

HENRY D. STOVER AND J. YV. BICKNELL, OF BOSTON, MASSACHUSETTS.

ROTARY PLANING-CUTTER.

Specification of Letters Patent No. 25,286, dated August 30, 1859.

To all whom 'it may concern.'

Be it known that we, HENRY D. STOVER and J AMES lV. BICKNELL, both ofBoston, in the county of Suffolk and State of Massachusetts, haveinvented certain new and useful Improvements in Machines for CuttingIrregular Forms and for Similar Purposes; and we do hereby declare thatthe following is a full, clear, and exact description of the same,reference being had to the accompanying drawings, and to the letters ofreference marked thereon, in which drawings- Figure l, is a sectionalelevation of a cutter head and the guard (J) combined. Fig. 2, is a planof the same. Fig. 3, is an elevation of the cutter head, the guard (J)having been removed. Fig. 4, is a section of the same at A, B, and Fig.5, is a plan. Fig. 6, is a sect-ion of guard (J) at C, D.

Our improvements consist principally in the application of the guard (J)as we will proceed to describe. The main part of the head (a) has acircular base and the screw (b) by which it may be attached to the arborof the machine. From the circular base upward as shown in the drawingtwo sides are flattened to receive the cutting knives (c) and (d) andfrom near the upper end of the knives upward it is rounded to receivethe circular' piece (e) the under side of (e) and the upper partof thecircular base have corresponding oblique sided grooves of suiiicientthickness to receive the ends of the pieces (f) and (g) outside of thecutting knives and which ends are made to correspond to the obliquesides of the grooves so that when the part (e) is forced down theoblique sides of the grooves acting upon the oblique ends of the partsand (g) force. them toward the axis of the head and they are so made toclamp the knives throughout their entire length firmly against theflattened sides of the main part, the upper end of which is screwed andfurnished with two nuts (iz.) and (i). (it) is for the purpose offorcing down the part (e) as be- (z') is a set nut by means of foredescribed.

which (h.) is prevented from turning and getting loose.

A guard (J) is screwed to the upper end of (a) in such a manner that itsheight may be adjusted according to the height of the stuff to beworked. This guard projects outward beyond the edges of the knives,inclosing or covering that part of the head above the stuff to be workedand is for the double purpose of protecting the operators frommutilating their hands as by accident has frequently been done bycontact with the cutters and of preventing the stuff from being thrownup or drawn up from the table by the cutters as it is otherwise apt tobe under various circumstances. The exterior of (J) is made round andsmooth exceptwhere the wrench is applied. The flange at (n) serves tokeep the guard concentric with the axis of head. The nut (l) is toadjustand bind the guard (J This is done by turning the guard up or downupon the screw to near the desired position, then turning the nutagainst the guard and apply the wrench to the hexagonal part (m) of theguard the nut (Z) is made round and smooth like the guard so that it maynot bruise the hands when they chance to come in contact with it whilein motion. The guard (J) may be made some larger than the head so thatdifferentknives may be used with each size of guard.

Vhat we claim as our invention and desire to secure by Letters Patent isas follows:

W'e claim the adjust-able revolving guard (J), as constructed andconnected, adjustably to the cutter head, carried by, and having all itsmovements, to eifectually protect the operator from mutilation, and tohold down the material receiving shape, essentially in the manner fullyset forth.

HENRY D. STOVER. JAMES-W- BICKNELL. Witnesses J. H. THOMPSON, AXELDEARoRN.

